This reissue of the 1932 edition of Hydrodynamics is a tribute to the lasting value of Sir Horace Lambs's work. Constantly in use since its first publication in 1879, this book is the definitive reference work for all fluid dynamicists. The new foreword by Professor Russel Caflisch highlights the prominence of this treatise in the field, and outlines its position in the historical development of fluid mechanics.